The mean value of 20 observations was found to be 75, but later on it was detected that 97 was misread as 79. Find the correct mean.

The mean value of 20 observations was found to be 75, but later on it

1.	The mean value of 20 observations was found to be 75, but later on it was detected that 97 was misread as 79. Find the correct mean.
A.	75.7
B.	75.8
C.	75.9
D.	75.6
Answer» D. 75.6

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The mean value of 20 observations was found to be 75, but later on it was detected that 97 was misread as 79. Find the correct mean.

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